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Rollernet's free tier failed the validation gates before any DNS change (200 msgs / 10 MB per rolling week, then 48h of SMTP 5xx bounces — worse than no backup MX; free accounts being discontinued). Viktor chose to stay free, so the backup MX becomes a Postfix store-and-forward relay on an Oracle Always-Free VM (mx2.viktorbarzin.me, MX pref 20), draining via port 2526 through the existing pfSense HAProxy frontend since Oracle blocks egress 25. Two independent adversarial reviews then fixed the design: primary-side drain enablement moved to the layers that actually reject (unknown- client-hostname, spoof protection, anvil limits, rspamd reject tier -> external_relay + action cap, never backscatter), monitoring moved off the nonexistent cluster->tailnet path to allowlisted public-IP scrapes, bounce lifetime cut to 1d (the VM can never deliver DSNs), OCI OS-level iptables + reserved-IP + mandatory PAYG requirements added, and 4xx-only postscreen hygiene replaces the blanket no-filtering stance. ADR-0019 and the design doc renamed accordingly (rollernet -> oracle). Co-Authored-By: Claude Fable 5 <noreply@anthropic.com> |
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Infrastructure Documentation
This repository contains the configuration and documentation for a homelab Kubernetes cluster running on Proxmox. The infrastructure hosts 70+ services managed declaratively with Terraform and Terragrunt.
Quick Reference
Network Ranges
- Physical Network:
192.168.1.0/24- Physical devices and host network - Management VLAN 10:
10.0.10.0/24- Infrastructure VMs and management - Kubernetes VLAN 20:
10.0.20.0/24- Kubernetes cluster network
Key URLs
- Public:
viktorbarzin.me - Internal:
viktorbarzin.lan
Architecture Documentation
| Document | Description |
|---|---|
| Overview | Infrastructure overview, hardware specs, VM inventory, and service catalog |
| Networking | Network topology, VLANs, routing, and firewall rules |
| VPN | Headscale mesh VPN and Cloudflare Tunnel configuration |
| Storage | Proxmox host NFS, Proxmox CSI (LVM-thin + LUKS2), and persistent volume management |
| Authentication | Authentik SSO, OIDC flows, and service integration |
| Security | CrowdSec IPS, Kyverno policies, and security controls |
| Monitoring | Prometheus, Grafana, Loki, and observability stack |
| Secrets Management | HashiCorp Vault integration and secret rotation |
| CI/CD | Woodpecker CI pipeline and deployment automation |
| Backup & DR | Backup strategy, disaster recovery, and restore procedures |
| Compute | Proxmox VMs, GPU passthrough, K8s resource management, and VPA |
| Databases | PostgreSQL, MySQL, Redis, and database operators |
| Multi-tenancy | Namespace isolation, tier system, and resource quotas |
Operations
- Runbooks - Step-by-step operational procedures
- Plans - Infrastructure change plans and rollout strategies
Getting Started
- Review the Overview for a high-level understanding
- Read the Networking doc to understand connectivity
- Check Compute for resource management patterns
- Explore individual architecture docs based on your area of interest